Final answer:
The correct answer is d) Head strap. When creating a seal on an unresponsive person's face using a ventilation mask, it is important to lift the head strap. The head strap secures the ventilation mask in place, ensuring a proper seal and preventing air leakage.
Step-by-step explanation:
The correct answer is d) Head strap.
When creating a seal on an unresponsive person's face using a ventilation mask, it is important to lift the head strap. The head strap secures the ventilation mask in place, ensuring a proper seal and preventing air leakage. By lifting the head strap, the mask can be positioned correctly over the person's nose and mouth, allowing for effective ventilation.